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Re: Which method do you like for calculating deflection

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I like to use M/EI approach. It is simple and easy. All you need to do is
calculating the moments (M) at interior supports. Then the moment from the
area of the M/EI diagrams on any span will be the deflection you need to
superimpose to your simple span deflection of that same span.

If you have variable I girders, it will be some cumbersome though. So, I
developed some programs. It will not only print out the deflections for any
span combinations (up to 12 spans), it will also print out influence lines,
moments, shears and reactions. I have also developed some LRFD programs
(Pier analysis, Field Splice design). These programs are very handy in
planning and designing your bridge projects. Let me know if you are

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